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I wanted a tiny scriptable meltdown proof way to run userspace programs and visualize how program execution impacts memory. It helps to explain how things like Actually Portable Executable works. It can show you how the GCC generated code is going about manipulating matrices and more. I didn't feel fully comfortable with Qemu and Bochs because I'm not smart enough to understand them. I wanted something like gVisor but with much stronger levels of assurances. I wanted a single binary that'll run, on all major operating systems with an embedded GPL barrier ZIP filesystem that is tiny enough to transpile to JavaScript and run in browsers too. https://justine.storage.googleapis.com/emulator625.mp4
15 lines
539 B
C
15 lines
539 B
C
#ifndef COSMOPOLITAN_LIBC_STR_KNUTHMULTIPLICATIVEHASH_H_
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#define COSMOPOLITAN_LIBC_STR_KNUTHMULTIPLICATIVEHASH_H_
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#if !(__ASSEMBLER__ + __LINKER__ + 0)
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forceinline uint32_t KnuthMultiplicativeHash32(const void *buf, size_t size) {
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size_t i;
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uint32_t h;
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const uint32_t kPhiPrime = 0x9e3779b1;
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const unsigned char *p = (const unsigned char *)buf;
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for (h = i = 0; i < size; i++) h = (p[i] + h) * kPhiPrime;
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return h;
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}
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#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
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#endif /* COSMOPOLITAN_LIBC_STR_KNUTHMULTIPLICATIVEHASH_H_ */
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